1. Thünen Institute of Climate‐Smart Agriculture Federal Research Institute for Rural Areas, Forestry and Fisheries Bundesallee 50 Braunschweig 38116 Germany
2. Landwirtschaftskammer Niedersachsen Mars‐la‐Tour Str. 1‐13 Oldenburg 26121 Germany
3. Department of Soil Physics Helmholtz Centre for Environmental Research ‐ UFZ Theodor‐Lieser‐Straße 4 Halle 06120 Germany
4. Integrated Carbon Observation System (ICOS) University of Helsinki Headoffice FI‐00014 Finland